Original Research

Pre-slaughter, slaughter and post-slaughter defects of skins and hides at the Sheba Tannery and Leather Industry, Tigray region, northern Ethiopia

Tesfay Kahsay, Guesh Negash, Yohannes Hagos, Birhanu Hadush
Onderstepoort Journal of Veterinary Research | Vol 82, No 1 | a931 | DOI: https://doi.org/10.4102/ojvr.v82i1.931 | © 2015 Tesfay Kahsay, Guesh Negash, Yohannes Hagos, Birhanu Hadush | This work is licensed under CC Attribution-NoDerivatives 4.0
Submitted: 20 January 2015 | Published: 21 August 2015

About the author(s)

Tesfay Kahsay, College of Veterinary Medicine, Mekelle University, Ethiopia
Guesh Negash, College of Veterinary Medicine, Mekelle University, Ethiopia
Yohannes Hagos, College of Veterinary Medicine, Mekelle University, Ethiopia
Birhanu Hadush, College of Veterinary Medicine, Mekelle University, Ethiopia


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Abstract

Skins and hides are perishable resources that can be damaged by parasitic diseases and human error, which result in downgrading or rejection. This study was conducted to identify defect types and to determine their prevalence in pickled sheep and wet blue goat skins and wet blue hides. Each selected skin or hide was examined for defects in natural light and the defects were graded according to established quality criteria in Ethiopian standard manuals. Major defects were captured by digital photography. The major pre-slaughter defects included scratches (64.2%), cockle (ekek) (32.8%), wounds or scars (12.6%), lesions from pox or lumpy skin disease (6.1%), poor substance (5%), branding marks (2.3%) and tick bites (1.5%). The presence of grain scratches in wet blue hides (76.3%) was significantly higher than in pickled sheep (67.2%) and wet blue goat (59.1%) skins. The major slaughter defects included flay cuts or scores, holes, poor pattern and vein marks, with a higher occurrence in wet blue goat skins (28.7%; P < 0.001) than in wet blue hides (22.8%) and pickled sheep skins (11.1%). The most prevalent postslaughter defects were grain cracks (14.9%), hide beetle damage (8%), damage caused by heat or putrefaction (3.7%) and machine-induced defects (0.5%). Grain cracks (27.04%) and hide beetle damage (13.9%) in wet blue goat skins were significantly more common than in wet blue hides and pickled sheep skins. These defects cause depreciation in the value of the hides and skins. Statistically significant (P < 0.001) higher rejection rates were recorded for wet blue hides (82.9%) than for pickled sheep skins (18.3%) and wet blue goat skins (8.5%). Improved animal health service delivery, effective disease control strategies and strong collaboration between stakeholders are suggested to enhance the quality of skins and hides.

Keywords

Rejects, Pickled sheep skins, Quality grading, Wet blue goat skins, Wet blue hides,

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